Hi, I have owned by SR40 for 18 months and have fired about 4500 rounds through it. As a re-loader I tried various powders and bullets to find what best worked for my particular pistol.
I settled for the following recipe: Bullet: 165gr Zero HPJ, Powder: Powder Pistol 6.4gr, Primer CCI small pistol, OAL 1.125”. With this load I was consistently shooting a 3” group at 15yds. But in the last month or so by groups have deteriorated to 6” and I just cannot figure out what is making the difference.
I am regularly cleaning the pistol using stands solvents and can rule out crud accumulation. I am ruling myself out as I am consistently shooting similar groups with my other guns. Next range session I will try to shoot form a bench rest to get a clear picture. But I was speculating if I may have shot out the SS barrel? Is that possible with less than 5000 rounds through it?
Your thoughts would be welcome.

__________________ What did Mrs. Bullet say to Mr. Bullet? ... "We're having a BeeBee!"...IF THE SHOE FITS, WEAR IT!... IF THE GUN FITS, SHOOT IT!
"Experience is something you don't get until just after you need it."

out of curiosity how often are you changing out your brass? how many times do you normally reload before you throw your brass away?

one thing you may try is buying a few boxes of quality ammo and seeing if it makes any difference.

__________________
ignore my complete lack of capitalization. I still have no problem correcting your grammar.
I never said half the crap people said I did-Albert Einstein
You can't believe everything you read on the internet-Benjamin Franklin
Bean counters told me I couldn't fire a man for being in a wheelchair, did it anyway. Ramps are expensive.-Cave Johnson.

This email link is to reach site administrators for assistance, if you cannot access TFL via other means. If you are a TFL member and can access TFL, please do not use this link; instead, use the forums (like Questions, Suggestions, and Tech Support) or PM an appropriate mod or admin.

If you are experiencing difficulties posting in the Buy/Sell/Trade subforums of TFL, please read the "sticky" announcement threads at the top of the applicable subforum. If you still feel you are qualified to post in those subforums, please contact "Shane Tuttle" (the mod for that portion of TFL) via Private Message for assistance.

This email contact address is not an "Ask the Firearms Expert" service. Such emails will be ignored. If you have a firearm related question, please register and post it on the forums.